package com.godtree.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;

/**
 * Servlet Filter implementation class EncodeFilter
 */
//@WebFilter(filterName="encodeFilter",urlPatterns={"/*"},initParams={@WebInitParam(name="encoding",value="UTF-8")})
public class EncodeFilter implements Filter {

	protected String encoding=null;

	/**
     * Default constructor. 
     */
    public EncodeFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
		this.encoding = null; 
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		request.setCharacterEncoding(encoding);

		response.setContentType("text/html;charset="+encoding);

		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
		 this.encoding = fConfig.getInitParameter("encoding");
	}

}
